[Twig] asset extended helper

Matching for  js or css file with * in `asset` helper, the first matched asset file will be included.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | symfony/symfony-docs#2276

For code
        
    <script src="{{ asset('js/jquery*.js') }}" type="text/javascript"></script> 

resulting template will include link to js/jquery-1.8.3.js if it exists.

It is useful when you want to use assets from bundles supplied by third-party vendors.

The same feature exists in AsseticBundle, but It could be heavy or not neccessary to recreate static file from public folder. Also we need to write more code for same behavior, e.g.

    {% javascripts 'js/jquery*.js' %}
    <script src="{{ asset_url }}"></script>
    {% endjavascripts %}